Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7127263 | Private branch exchange system | — | 2006-10-24 |
| 6810267 | Radio communication system, private branch exchange and radio terminal for place of business | — | 2004-10-26 |
| 6366773 | Radio terminal operation data write method in private mobile communication system | Eiji Katsuki | 2002-04-02 |
| 6298237 | Radio switching equipment permitting a plurality of mobile terminals to use one trunk circuit and a circuit control method for radio switching equipment | Akira Sekinishi | 2001-10-02 |